English
Related papers

Related papers: Characterizing Variable Stars in a Single Night wi…

200 papers

The discovery of variable and transient sources is an essential product of synoptic surveys. The alert stream will require filtering for personalized criteria -- a process managed by a functionality commonly described as a Broker. In order…

Solar and Stellar Astrophysics · Physics 2015-06-22 Stephen T. Ridgway , Thomas Matheson , Kenneth J. Mighell , Knut A. Olsen , Steve B. Howell

Long-period variables are bright, evolved red giant stars showing periodic photometric changes due to stellar pulsation. They follow one or more period-luminosity and period-age relations, which make them highly promising distance…

Solar and Stellar Astrophysics · Physics 2024-11-20 Michele Trabucchi

An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing…

Astrophysics · Physics 2008-11-26 Laurent Eyer , Nami Mowlavi

High-quality light curves from space missions have opened up a new window on the rotational and pulsational properties of magnetic chemically peculiar (mCP) stars and have fuelled asteroseismic studies. They allow the internal effects of…

Solar and Stellar Astrophysics · Physics 2023-08-09 J. Labadie-Bartz , S. Hümmerich , K. Bernhard , E. Paunzen , M. E. Shultz

We analyse 829,481 stars from the Next Generation Transit Survey (NGTS) to extract variability periods. We utilise a generalisation of the autocorrelation function (the G-ACF), which applies to irregularly sampled time series data. We…

The Rapid Temporal Survey (RATS) explores the faint, variable sky. Our observations search a parameter space which, until now, has never been exploited from the ground. Our strategy involves observing the sky close to the Galactic plane…

Astrophysics of Galaxies · Physics 2015-05-27 Thomas Barclay , Gavin Ramsay , Pasi Hakala , Ralf Napiwotzki , Gijs Nelemans , Stephen Potter , Ian Todd

Here, we study the microlensing of radially pulsating stars. Discerning and characterizing the properties of distant, faint pulsating stars is achievable through high-cadence microlensing observations. Combining stellar variability period…

Solar and Stellar Astrophysics · Physics 2020-04-22 Sedighe Sajadian , Richard Ignace

There is growing observational evidence that the irregular changes in the light curves of certain variable stars might be due to deterministic chaos. Supporting these conclusions, several simple models of non-linear oscillators have been…

Astrophysics · Physics 2009-11-07 Andreea Munteanu , Enrique Garcia-Berro , Jordi Jose

We investigate the question whether there is a real difference in the light change between stars classified as semiregular (SRV) or irregular (Lb) variables by analysing photometric light curves of 12 representatives of each class. Using…

Solar and Stellar Astrophysics · Physics 2009-11-13 T. Lebzelter , M. Obbrugger

We provide an overview of stellar variability in the first quarter of data from the Kepler mission. The intent of this paper is to examine the entire sample of over 150,000 target stars for periodic behavior in their lightcurves, and relate…

We present the results of an automated variability analysis of the Kepler public data measured in the first quarter (Q1) of the mission. In total, about 150 000 light curves have been analysed to detect stellar variability, and to identify…

Solar and Stellar Astrophysics · Physics 2015-05-27 J. Debosscher , J. Blomme , C. Aerts , J. De Ridder

We have identified some two-hundred new variable stars in a systematic study of a data archive obtained with the Calvin-Rehoboth observatory. Of these, we present five close binaries showing behaviors presumably due to star spots or other…

Solar and Stellar Astrophysics · Physics 2013-10-03 Steven D. Steenwyk , Daniel M. Van Noord , Lawrence A. Molnar

This paper describes the first part of the photometric data from the 9x9 deg ASAS cameras monitoring the whole southern hemisphere in V-band. Data acquisition and reduction pipeline is described and preliminary list of variable stars is…

Astrophysics · Physics 2009-07-09 G. Pojmanski

To extend LSST's coverage of the transient and variable sky down to minute timescales, we propose that observations of the Deep Drilling Fields are acquired in sequences of continuous exposures each lasting 2--4 hours. This will allow LSST…

Instrumentation and Methods for Astrophysics · Physics 2018-12-10 Keaton J. Bell , J. J. Hermes

This paper describes the second part of the photometric data from the 9x9 deg ASAS camera monitoring the whole southern hemisphere in the V-band. Preliminary list of variable stars based on observations obtained since January 2001 is…

Astrophysics · Physics 2007-05-23 G. Pojmanski

We present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to MMT/Megacam image archive. This new analysis allows a…

Solar and Stellar Astrophysics · Physics 2015-05-19 S. -W. Chang , Y. -I. Byun , J. D. Hartman

We develop a new and powerful method to analyze time series to rigorously detect flares in the presence of an irregularly oscillatory baseline, and apply it to stellar light curves observed with TESS. First, we remove the underlying…

Solar and Stellar Astrophysics · Physics 2025-12-23 Qiyuan Wang , Giovanni Motta , Genaro Sucarrat , Vinay L. Kashyap

Periodic variables illuminate the physical processes of stars throughout their lifetime. Wide-field surveys continue to increase our discovery rates of periodic variable stars. Automated approaches are essential to identify interesting…

Solar and Stellar Astrophysics · Physics 2022-06-29 H. S. Chan , V. Ashley Villar , S. H. Cheung , Shirley Ho , Anna J. G. O'Grady , Maria R. Drout , Mathieu Renzo

The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of $\sim2-3$ days down to V$\lesssim17$ mag. ASAS-SN has monitored the whole sky since 2014, collecting…

There are a few different mechanisms that can cause white dwarf stars to vary in brightness, providing opportunities to probe the physics, structures, and formation of these compact stellar remnants. The observational characteristics of the…

Solar and Stellar Astrophysics · Physics 2025-02-20 Keaton J. Bell